arm64: dts: librem5-devkit: "Drop Line In Jack"

The SGTL500s LINEINL and LINEINR are N/C.
Signed-off-by: NGuido Günther <agx@sigxcpu.org>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts

@@ -171,12 +171,10 @@
 		simple-audio-card,widgets =
 			"Microphone", "Microphone Jack",
 			"Headphone", "Headphone Jack",
-			"Speaker", "Builtin Speaker",
-			"Line", "Line In Jack";
+			"Speaker", "Builtin Speaker";
 		simple-audio-card,routing =
 			"MIC_IN", "Microphone Jack",
 			"Microphone Jack", "Mic Bias",
-			"LINE_IN", "Line In Jack",
 			"Headphone Jack", "HP_OUT",
 			"Builtin Speaker", "Speaker Amp OUTR",
 			"Speaker Amp INR", "LINE_OUT";